survivorship curve

Examples of survivorship curve in the following topics:

• The Study of Population Dynamics

  • Demography, or the study of population dynamics, is studied using tools such as life tables and survivorship curves.
  • Trees, marine invertebrates, and most fishes exhibit a Type III survivorship curve.
  • Survivorship curves show the distribution of individuals in a population according to age
  • Birds have a Type II survivorship curve, as death at any age is equally probable.
  • Distinguish between life tables and survivorship curves as used in demography

• Theories of Life History

  • Modern theories of life history incorporate life and survivorship factors with ecological concepts associated with r- and K-selection theories.
  • This includes the way they obtain resources and care for their young, as well as length of life and survivorship factors.

• Logistic Population Growth

  • A graph of this equation yields an S-shaped curve ; it is a more-realistic model of population growth than exponential growth.
  • There are three different sections to an S-shaped curve.
  • Yeast, a microscopic fungus used to make bread and alcoholic beverages, exhibits the classical S-shaped curve when grown in a test tube ( a).
  • In the real world, however, there are variations to this idealized curve.
  • When resources are unlimited, populations exhibit exponential growth, resulting in a J-shaped curve.

• Human Axial Skeleton

  • The names of the spinal curves correspond to the region of the spine in which they occur.
  • The thoracic and sacral curves are concave, while the cervical and lumbar curves are convex.
  • The ribs are 12 pairs of long, curved bones that attach to the thoracic vertebrae and curve toward the front of the body, forming the ribcage.
  • (b) Spinal curves increase the strength and flexibility of the spine.

• Transport of Oxygen in the Blood

  • The resulting graph, an oxygen dissociation curve, is sigmoidal, or S-shaped .
  • The oxygen dissociates from the Hb molecule, shifting the oxygen dissociation curve to the right.
  • A similar shift in the curve also results from an increase in body temperature.
  • The oxygen dissociation curve demonstrates that as the partial pressure of oxygen increases, more oxygen binds hemoglobin.

• Exponential Population Growth

  • When the population size, N, is plotted over time, a J-shaped growth curve is produced .
  • When resources are unlimited, populations exhibit exponential growth, resulting in a J-shaped curve.
  • It levels off when the carrying capacity of the environment is reached, resulting in an S-shaped curve.

• Modern Reptiles

  • The dominant group, which includes all North American species, retracts its neck in a vertical S-curve.
  • Turtles in the less speciose clade retract the neck with a horizontal curve.

• Pollination by Bats, Birds, Wind, and Water

  • The flower typically has a curved, tubular shape, which allows access for the bird's beak.

• Lipid Molecules

  • It has three cis double bonds and, as a result, a curved shape.

• Types of Synovial Joints

  • Planar joints have bones with articulating surfaces that are flat or slightly curved.